Glossary - P

Timber product, intermediate in quality between sawlog and chip/pulpwood. Normally 12 to 16 cm top diameter (but can be bigger) and two to three metres long. Used for making pallets. Called "bars" in England and Wales.

Palmate

Leaves that have lobes arranged like the fingers of a hand, e.g. horse chestnut.

Chemical process carried out by green plants in the presence of light, which combines carbon dioxide from the atmosphere with hydrogen from water in the soil to form sugars as food for the growing plant. Oxygen is a by-product of the reaction.

Pinetum

A botanical collection of conifers, not just pines.

Pinnate

Term used of leaf completely subdivided into several leaflets ranged along either side of midrib, e.g. ash.

A machine that debranches a felled tree, and converts it to predetermined lengths. The tree is felled manually. See also
Harvester.

Productive wood or forest

Wood or forest where timber production is a primary objective of management: can consist of introduced or native species, or a mixture.

Propagation

Regeneration of new plants by means other than seed, e.g. by rooting cuttings.

Provenance

Term referring to the variation in appearance of a species according to its geographical origin, e.g. coastal provenance of Lodgepole pine grows bushy and squat, inland provenance grows tall and straight.

Pruning (usually referred to as high pruning)

Removal of branches usually on selected stems only, above the height of
Brashing with the object of reducing the knots in the timber being formed.